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Re: 89 S10 4.3 Need help troubleshooting TBI/IAC Idle issue
Check out these threads. Then post your thoughts.
I would check for problems in the order I posted the links.
I would think you replaced the base gasket under the TBI when you rebuilt the TBI, but if you didn’t you should of, it is a common spot for a vacuum leak.
High idle thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=439984
Coolant sensor testing specifications and instructions:
http://67-72chevytrucks.com/vboard/s...d.php?t=379142
Fuel pump testing information; truck had split hose in tank-
http://67-72chevytrucks.com/vboard/s...d.php?t=375132
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For those of you that are wondering why you are not getting replies to your thread:
Did you give the model, year, engine, fuel system type, and transmission information?
If it is modified from what came stock from the factory, let us know that too.
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